White gold is an alloy of gold and other metals that gives it a white or silvery color. The most common metals used in white gold are nickel, zinc, and copper. Other metals that can be used include palladium, silver, and platinum.

The proportions of these metals can vary depending on the desired color and properties of the white gold. For example, a higher proportion of nickel will result in a whiter color, while a higher proportion of copper will give the white gold a more rosy hue.

White gold is often used in jewelry, particularly in engagement rings and wedding bands. It is also used in other applications, such as dental fillings and watch cases.